The perimeter of a square is four times the length of any of its sides. Thus, you can divide the perimeter by 4, and then square the result to get the area.
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The area of a square with a perimeter of 12 feet is: 9 square feet.
The area of a square with a 12-foot perimeter is: nine square feet.
Perimeter = 12+12+16+16 = 56 feet Area = 12*16 = 192 square feet
As area is 12 square feet, each side must be 3.464 feet long (3.464 X 3.464 = 12). So the perimeter is 4 times that - 4 x 3.464 = 13.856
Base = 102/12 = 8.5 feet Perimeter = 12+8.5+12+8.5 = 41 feet